1 /*****************************************************************************
2 * update.c: VLC update checking and downloading
3 *****************************************************************************
4 * Copyright © 2005-2008 the VideoLAN team
7 * Authors: Antoine Cellerier <dionoea -at- videolan -dot- org>
8 * Rémi Duraffort <ivoire at via.ecp.fr>
9 Rafaël Carré <funman@videolanorg>
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either release 2 of the License, or
14 * (at your option) any later release.
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
24 *****************************************************************************/
26 * XXX: should use v4 signatures for binary files (already used for public key)
30 * This file contains functions related to VLC update management
33 /*****************************************************************************
35 *****************************************************************************/
47 #include <vlc_update.h>
48 #include <vlc_pgpkey.h>
49 #include <vlc_stream.h>
50 #include <vlc_interface.h>
53 /*****************************************************************************
55 *****************************************************************************/
58 * Here is the format of these "status files" :
59 * First line is the last version: "X.Y.Ze" where:
60 * * X is the major number
61 * * Y is the minor number
62 * * Z is the revision number
63 * * e is an OPTIONAL extra letter
64 * * AKA "0.8.6d" or "0.9.0"
65 * Second line is an url of the binary for this last version
66 * Third line is a description of the update (it MAY be extended to several lines, but for now it is only one line)
69 #if defined( UNDER_CE )
70 # define UPDATE_VLC_STATUS_URL "http://update.videolan.org/vlc/status-ce"
71 #elif defined( WIN32 )
72 # define UPDATE_VLC_STATUS_URL "http://update.videolan.org/vlc/status-win-x86"
73 #elif defined( __APPLE__ )
74 # if defined( __powerpc__ ) || defined( __ppc__ ) || defined( __ppc64__ )
75 # define UPDATE_VLC_STATUS_URL "http://update.videolan.org/vlc/status-mac-ppc"
77 # define UPDATE_VLC_STATUS_URL "http://update.videolan.org/vlc/status-mac-x86"
79 #elif defined( SYS_BEOS )
80 # define UPDATE_VLC_STATUS_URL "http://update.videolan.org/vlc/status-beos-x86"
82 # define UPDATE_VLC_STATUS_URL "http://update.videolan.org/vlc/status"
86 /*****************************************************************************
88 *****************************************************************************/
89 static void EmptyRelease( update_t *p_update );
90 static vlc_bool_t GetUpdateFile( update_t *p_update );
91 static int CompareReleases( const struct update_release_t *p1,
92 const struct update_release_t *p2 );
93 static char * size_str( long int l_size );
96 /*****************************************************************************
98 *****************************************************************************/
100 #define packet_type( c ) ( ( c & 0x3c ) >> 2 ) /* 0x3C = 00111100 */
101 #define packet_header_len( c ) ( ( c & 0x03 ) + 1 ) /* number of bytes in a packet header */
103 static inline int scalar_number( uint8_t *p, int header_len )
105 if( header_len == 1 )
107 else if( header_len == 2 )
108 return( (p[0] << 8) + p[1] );
109 else if( header_len == 4 )
110 return( (p[0] << 24) + (p[1] << 16) + (p[2] << 8) + p[3] );
115 /* number of data bytes in a MPI */
116 #define mpi_len( mpi ) ( ( scalar_number( mpi, 2 ) + 7 ) / 8 )
119 * fill a public_key_packet_t structure from public key packet data
120 * verify that it is a version 4 public key packet, using DSA
122 static int parse_public_key_packet( public_key_packet_t *p_key, uint8_t *p_buf,
123 size_t i_packet_len )
125 if( i_packet_len > 418 )
128 p_key->version = *p_buf++;
129 if( p_key->version != 4 )
132 /* warn when timestamp is > date ? */
133 memcpy( p_key->timestamp, p_buf, 4 ); p_buf += 4;
135 p_key->algo = *p_buf++;
136 if( p_key->algo != PUBLIC_KEY_ALGO_DSA )
139 int i_p_len = mpi_len( p_buf );
144 memcpy( p_key->p, p_buf, 2+i_p_len ); p_buf += 2+i_p_len;
146 memmove( p_key->q, p_key->p + 2+i_p_len, 2+20 + 2+128 + 2+128 );
149 int i_q_len = mpi_len( p_buf );
154 memcpy( p_key->q, p_buf, 2+i_q_len ); p_buf += 2+i_q_len;
156 memmove( p_key->g, p_key->q + 2+i_q_len, 2+128 + 2+128 );
159 int i_g_len = mpi_len( p_buf );
164 memcpy( p_key->g, p_buf, 2+i_g_len ); p_buf += 2+i_g_len;
166 memmove( p_key->y, p_key->g + 2+i_g_len, 2+128 );
169 int i_y_len = mpi_len( p_buf );
173 memcpy( p_key->y, p_buf, 2+i_y_len );
179 * fill a signature_packet_v4_t from signature packet data
180 * verify that it was used with a DSA public key, using SHA-1 digest
182 static int parse_signature_v4_packet( signature_packet_v4_t *p_sig,
183 uint8_t *p_buf, size_t i_sig_len )
188 p_sig->version = *p_buf++;
189 if( p_sig->version != 4 )
192 p_sig->type = *p_buf++;
193 if( p_sig->type < GENERIC_KEY_SIGNATURE ||
194 p_sig->type > POSITIVE_KEY_SIGNATURE )
197 p_sig->public_key_algo = *p_buf++;
198 if( p_sig->public_key_algo != PUBLIC_KEY_ALGO_DSA )
201 p_sig->digest_algo = *p_buf++;
202 if( p_sig->digest_algo != DIGEST_ALGO_SHA1 )
205 memcpy( p_sig->hashed_data_len, p_buf, 2 ); p_buf += 2;
208 size_t i_hashed_data_len = scalar_number( p_sig->hashed_data_len, 2 );
209 i_pos += i_hashed_data_len;
210 if( i_pos > i_sig_len - 48 ) /* r & s are 44 bytes in total,
211 * + the unhashed data length (2 bytes)
212 * + the hash verification (2 bytes) */
215 p_sig->hashed_data = (uint8_t*) malloc( i_hashed_data_len );
216 if( !p_sig->hashed_data )
218 memcpy( p_sig->hashed_data, p_buf, i_hashed_data_len );
219 p_buf += i_hashed_data_len;
221 memcpy( p_sig->unhashed_data_len, p_buf, 2 ); p_buf += 2;
223 size_t i_unhashed_data_len = scalar_number( p_sig->unhashed_data_len, 2 );
224 i_pos += 2 + i_unhashed_data_len;
225 if( i_pos != i_sig_len - 46 )
227 free( p_sig->hashed_data );
231 p_sig->unhashed_data = (uint8_t*) malloc( i_unhashed_data_len );
232 if( !p_sig->unhashed_data )
234 free( p_sig->hashed_data );
237 memcpy( p_sig->unhashed_data, p_buf, i_unhashed_data_len );
238 p_buf += i_unhashed_data_len;
240 memcpy( p_sig->hash_verification, p_buf, 2 ); p_buf += 2;
242 int i_r_len = mpi_len( p_buf );
245 free( p_sig->hashed_data );
246 free( p_sig->unhashed_data );
251 memcpy( p_sig->r, p_buf, 2 + i_r_len );
252 p_buf += 2 + i_r_len;
255 int i_s_len = mpi_len( p_buf );
258 free( p_sig->hashed_data );
259 free( p_sig->unhashed_data );
264 memcpy( p_sig->s, p_buf, 2 + i_s_len );
265 p_buf += 2 + i_s_len;
272 * crc_octets() was lamely copied from rfc 2440
273 * Copyright (C) The Internet Society (1998). All Rights Reserved.
275 #define CRC24_INIT 0xB704CEL
276 #define CRC24_POLY 0x1864CFBL
278 static long crc_octets( uint8_t *octets, size_t len )
280 long crc = CRC24_INIT;
284 crc ^= (*octets++) << 16;
285 for (i = 0; i < 8; i++)
292 return crc & 0xFFFFFFL;
296 * Transform an armored document in binary format
297 * Used on public keys and signatures
299 static int pgp_unarmor( char *p_ibuf, size_t i_ibuf_len,
300 uint8_t *p_obuf, size_t i_obuf_len )
302 char *p_ipos = p_ibuf;
303 uint8_t *p_opos = p_obuf;
305 int i_header_skipped = 0;
307 while( !i_end && p_ipos < p_ibuf + i_ibuf_len && *p_ipos != '=' )
309 if( *p_ipos == '\r' || *p_ipos == '\n' )
315 size_t i_line_len = strcspn( p_ipos, "\r\n" );
316 if( i_line_len == 0 )
319 if( !i_header_skipped )
321 if( !strncmp( p_ipos, "-----BEGIN PGP", 14 ) )
322 i_header_skipped = 1;
324 p_ipos += i_line_len + 1;
328 if( !strncmp( p_ipos, "Version:", 8 ) )
330 p_ipos += i_line_len + 1;
334 if( p_ipos[i_line_len - 1] == '=' )
337 p_ipos[i_line_len - 1] = '\0';
340 p_ipos[i_line_len] = '\0';
342 p_opos += vlc_b64_decode_binary_to_buffer( p_opos,
343 p_obuf - p_opos + i_obuf_len, p_ipos );
344 p_ipos += i_line_len + 1;
347 /* XXX: the CRC is OPTIONAL, really require it ? */
348 if( p_ipos + 5 > p_ibuf + i_ibuf_len || *p_ipos++ != '=' )
352 if( vlc_b64_decode_binary_to_buffer( p_crc, 3, p_ipos ) != 3 )
355 long l_crc = crc_octets( p_obuf, p_opos - p_obuf );
356 long l_crc2 = ( 0 << 24 ) + ( p_crc[0] << 16 ) + ( p_crc[1] << 8 ) + p_crc[2];
358 return l_crc2 == l_crc ? p_opos - p_obuf : 0;
362 * Download the signature associated to a document or a binary file.
363 * We're given the file's url, we just append ".asc" to it and download
365 static int download_signature( vlc_object_t *p_this,
366 signature_packet_v3_t *p_sig,
367 const char *psz_url )
369 char *psz_sig = (char*) malloc( strlen( psz_url ) + 4 + 1 ); /* ".asc" + \0 */
373 strcpy( psz_sig, psz_url );
374 strcat( psz_sig, ".asc" );
376 stream_t *p_stream = stream_UrlNew( p_this, psz_sig );
382 int64_t i_size = stream_Size( p_stream );
383 if( i_size <= 65 ) /* binary format signature */
385 msg_Dbg( p_this, "Downloading unarmored signature" );
386 int i_read = stream_Read( p_stream, p_sig, (int)i_size );
387 stream_Delete( p_stream );
388 if( i_read != i_size )
390 msg_Dbg( p_this, "Couldn't read full signature" );
397 msg_Dbg( p_this, "Downloading armored signature" );
398 char *p_buf = (char*)malloc( i_size );
401 stream_Delete( p_stream );
405 int i_read = stream_Read( p_stream, p_buf, (int)i_size );
407 stream_Delete( p_stream );
409 if( i_read != i_size )
411 msg_Dbg( p_this, "Couldn't read full signature" );
416 int i_bytes = pgp_unarmor( p_buf, i_size, (uint8_t*)p_sig, 65 );
421 msg_Dbg( p_this, "Unarmoring failed" );
424 else if( i_bytes > 65 )
426 msg_Dbg( p_this, "Signature is too big: %d bytes", i_bytes );
431 int i_r_len = mpi_len( p_sig->r );
434 msg_Dbg( p_this, "Invalid signature, r number too big: %d bytes",
438 else if( i_r_len < 20 )
439 /* move s to the right place if r is less than 20 bytes */
440 memmove( p_sig->s, p_sig->r + 2 + i_r_len, 20 + 2 );
447 * Verify an OpenPGP signature made on some SHA-1 hash, with some DSA public key
449 static int verify_signature( uint8_t *p_r, uint8_t *p_s,
450 public_key_packet_t *p_key, uint8_t *p_hash )
452 /* the data to be verified (a SHA-1 hash) */
453 const char *hash_sexp_s = "(data(flags raw)(value %m))";
455 const char *key_sexp_s = "(public-key(dsa(p %m)(q %m)(g %m)(y %m)))";
457 const char *sig_sexp_s = "(sig-val(dsa(r %m )(s %m )))";
460 gcry_mpi_t p, q, g, y, r, s, hash;
461 p = q = g = y = r = s = hash = NULL;
462 gcry_sexp_t key_sexp, hash_sexp, sig_sexp;
463 key_sexp = hash_sexp = sig_sexp = NULL;
465 int i_p_len = mpi_len( p_key->p );
466 int i_q_len = mpi_len( p_key->q );
467 int i_g_len = mpi_len( p_key->g );
468 int i_y_len = mpi_len( p_key->y );
469 if( gcry_mpi_scan( &p, GCRYMPI_FMT_USG, p_key->p + 2, i_p_len, NULL ) ||
470 gcry_mpi_scan( &q, GCRYMPI_FMT_USG, p_key->q + 2, i_q_len, NULL ) ||
471 gcry_mpi_scan( &g, GCRYMPI_FMT_USG, p_key->g + 2, i_g_len, NULL ) ||
472 gcry_mpi_scan( &y, GCRYMPI_FMT_USG, p_key->y + 2, i_y_len, NULL ) ||
473 gcry_sexp_build( &key_sexp, &erroff, key_sexp_s, p, q, g, y ) )
476 int i_r_len = mpi_len( p_r );
477 int i_s_len = mpi_len( p_s );
478 if( gcry_mpi_scan( &r, GCRYMPI_FMT_USG, p_r + 2, i_r_len, NULL ) ||
479 gcry_mpi_scan( &s, GCRYMPI_FMT_USG, p_s + 2, i_s_len, NULL ) ||
480 gcry_sexp_build( &sig_sexp, &erroff, sig_sexp_s, r, s ) )
484 if( gcry_mpi_scan( &hash, GCRYMPI_FMT_USG, p_hash, i_hash_len, NULL ) ||
485 gcry_sexp_build( &hash_sexp, &erroff, hash_sexp_s, hash ) )
488 if( gcry_pk_verify( sig_sexp, hash_sexp, key_sexp ) )
494 if( p ) gcry_mpi_release( p );
495 if( q ) gcry_mpi_release( q );
496 if( g ) gcry_mpi_release( g );
497 if( y ) gcry_mpi_release( y );
498 if( r ) gcry_mpi_release( r );
499 if( s ) gcry_mpi_release( s );
500 if( hash ) gcry_mpi_release( hash );
501 if( key_sexp ) gcry_sexp_release( key_sexp );
502 if( sig_sexp ) gcry_sexp_release( sig_sexp );
503 if( hash_sexp ) gcry_sexp_release( hash_sexp );
508 * Return the long id (8 bytes) of the public key used to generate a signature
510 static uint8_t *get_issuer_from_signature_v4( signature_packet_v4_t *p_sig )
512 uint8_t *p = p_sig->unhashed_data;
513 uint8_t *max_pos = p + scalar_number( p_sig->unhashed_data_len, 2 );
517 int i_subpacket_len = *p < 192 ? *p++ :
518 *p < 255 ? ((*p++ - 192) << 8) + *p++ + 192 :
519 ((*++p) << 24) + (*++p << 16) + (*++p << 8) + *++p;
521 if( p >= max_pos - 1 )
524 if( *p == ISSUER_SUBPACKET )
527 p += i_subpacket_len;
533 * fill a public_key_t with public key data, including:
534 * * public key packet
535 * * signature packet issued by key which long id is p_sig_issuer
538 static int parse_public_key( const uint8_t *p_key_data, size_t i_key_len, public_key_t *p_key, const uint8_t *p_sig_issuer )
540 uint8_t *pos = (uint8_t*) p_key_data;
541 uint8_t *max_pos = pos + i_key_len;
544 #define PUBLIC_KEY_FOUND 0x01
545 #define USER_ID_FOUND 0x02
546 #define SIGNATURE_FOUND 0X04
548 uint8_t *p_key_unarmored = NULL;
550 signature_packet_v4_t sig;
552 p_key->psz_username = NULL;
553 p_key->sig.hashed_data = p_key->sig.unhashed_data = NULL;
555 if( !( *pos & 0x80 ) )
556 { /* first byte is ASCII, unarmoring */
557 p_key_unarmored = (uint8_t*)malloc( i_key_len );
558 if( !p_key_unarmored )
560 int i_len = pgp_unarmor( (char*)p_key_data, i_key_len,
561 p_key_unarmored, i_key_len );
566 pos = p_key_unarmored;
567 max_pos = pos + i_len;
570 while( pos < max_pos )
572 if( !(*pos & 0x80) || *pos & 0x40 )
575 int i_type = packet_type( *pos );
577 int i_header_len = packet_header_len( *pos++ );
578 if( pos + i_header_len > max_pos )
581 int i_packet_len = scalar_number( pos, i_header_len );
584 if( pos + i_packet_len > max_pos )
591 case PUBLIC_KEY_PACKET:
592 i_status |= PUBLIC_KEY_FOUND;
593 if( parse_public_key_packet( &p_key->key, pos, i_packet_len ) != VLC_SUCCESS )
597 case SIGNATURE_PACKET:
598 if( !p_sig_issuer || i_status & SIGNATURE_FOUND ||
599 parse_signature_v4_packet( &sig, pos, i_packet_len ) != VLC_SUCCESS )
601 p_issuer = get_issuer_from_signature_v4( &sig );
602 if( memcmp( p_issuer, p_sig_issuer, 8 ) == 0 )
604 memcpy( &p_key->sig, &sig, sizeof( signature_packet_v4_t ) );
605 i_status |= SIGNATURE_FOUND;
609 free( sig.hashed_data );
610 free( sig.unhashed_data );
615 if( p_key->psz_username ) /* save only the first User ID */
617 i_status |= USER_ID_FOUND;
618 p_key->psz_username = (uint8_t*)malloc( i_packet_len + 1);
619 if( !p_key->psz_username )
622 memcpy( p_key->psz_username, pos, i_packet_len );
623 p_key->psz_username[i_packet_len] = '\0';
631 free( p_key_unarmored );
633 if( !( i_status & ( PUBLIC_KEY_FOUND + USER_ID_FOUND ) ) )
636 if( p_sig_issuer && !( i_status & SIGNATURE_FOUND ) )
642 free( p_key->sig.hashed_data );
643 free( p_key->sig.unhashed_data );
644 free( p_key->psz_username );
645 free( p_key_unarmored );
650 * return a sha1 hash of a file
652 static uint8_t *hash_sha1_from_file( const char *psz_file,
653 signature_packet_v3_t *p_sig )
655 FILE *f = utf8_fopen( psz_file, "r" );
659 uint8_t buffer[4096];
662 if( gcry_md_open( &hd, GCRY_MD_SHA1, 0 ) )
669 while( ( i_read = fread( buffer, 1, sizeof(buffer), f ) ) > 0 )
670 gcry_md_write( hd, buffer, i_read );
672 gcry_md_putc( hd, p_sig->type );
673 gcry_md_write( hd, &p_sig->timestamp, 4 );
678 uint8_t *p_tmp = (uint8_t*) gcry_md_read( hd, GCRY_MD_SHA1);
679 uint8_t *p_hash = malloc( 20 );
681 memcpy( p_hash, p_tmp, 20 );
687 * download a public key (the last one) from videolan server, and parse it
689 static public_key_t *download_key( vlc_object_t *p_this, const uint8_t *p_longid, const uint8_t *p_signature_issuer )
692 if( asprintf( &psz_url, "http://download.videolan.org/pub/keys/%.2X%.2X%.2X%.2X%.2X%.2X%.2X%.2X.asc",
693 p_longid[0], p_longid[1], p_longid[2], p_longid[3],
694 p_longid[4], p_longid[5], p_longid[6], p_longid[7] ) == -1 )
697 stream_t *p_stream = stream_UrlNew( p_this, psz_url );
702 int64_t i_size = stream_Size( p_stream );
705 stream_Delete( p_stream );
709 uint8_t *p_buf = (uint8_t*)malloc( i_size );
712 stream_Delete( p_stream );
716 int i_read = stream_Read( p_stream, p_buf, (int)i_size );
717 stream_Delete( p_stream );
719 if( i_read != (int)i_size )
721 msg_Dbg( p_this, "Couldn't read full GPG key" );
726 public_key_t *p_pkey = (public_key_t*) malloc( sizeof( public_key_t ) );
733 int i_error = parse_public_key( p_buf, i_read, p_pkey, p_signature_issuer );
736 if( i_error != VLC_SUCCESS )
738 msg_Dbg( p_this, "Couldn't parse GPG key" );
747 * Generate a SHA-1 hash on a public key, to verify a signature made on that hash
748 * Note that we need the signature to compute the hash
750 static uint8_t *key_sign_hash( public_key_t *p_pkey )
752 gcry_error_t error = 0;
755 error = gcry_md_open( &hd, GCRY_MD_SHA1, 0 );
759 gcry_md_putc( hd, 0x99 );
761 gcry_md_putc( hd, (418 >> 8) & 0xff );
762 gcry_md_putc( hd, 418 & 0xff );
764 gcry_md_write( hd, (uint8_t*)&p_pkey->key, 6 ); /* version,timestamp,algo */
766 int i_p_len = mpi_len( p_pkey->key.p );
767 gcry_md_write( hd, (uint8_t*)&p_pkey->key.p, 2 );
768 gcry_md_write( hd, (uint8_t*)&p_pkey->key.p + 2, i_p_len );
770 int i_g_len = mpi_len( p_pkey->key.g );
771 gcry_md_write( hd, (uint8_t*)&p_pkey->key.g, 2 );
772 gcry_md_write( hd, (uint8_t*)&p_pkey->key.g + 2, i_g_len );
774 int i_q_len = mpi_len( p_pkey->key.q );
775 gcry_md_write( hd, (uint8_t*)&p_pkey->key.q, 2 );
776 gcry_md_write( hd, (uint8_t*)&p_pkey->key.q + 2, i_q_len );
778 int i_y_len = mpi_len( p_pkey->key.y );
779 gcry_md_write( hd, (uint8_t*)&p_pkey->key.y, 2 );
780 gcry_md_write( hd, (uint8_t*)&p_pkey->key.y + 2, i_y_len );
782 gcry_md_putc( hd, 0xb4 );
784 int i_len = strlen((char*)p_pkey->psz_username);
786 gcry_md_putc( hd, (i_len << 24) & 0xff );
787 gcry_md_putc( hd, (i_len << 16) & 0xff );
788 gcry_md_putc( hd, (i_len << 8) & 0xff );
789 gcry_md_putc( hd, (i_len) & 0xff );
791 gcry_md_write( hd, p_pkey->psz_username, i_len );
793 size_t i_hashed_data_len = scalar_number( p_pkey->sig.hashed_data_len, 2 );
795 gcry_md_putc( hd, p_pkey->sig.version );
796 gcry_md_putc( hd, p_pkey->sig.type );
797 gcry_md_putc( hd, p_pkey->sig.public_key_algo );
798 gcry_md_putc( hd, p_pkey->sig.digest_algo );
799 gcry_md_write( hd, p_pkey->sig.hashed_data_len, 2 );
800 gcry_md_write( hd, p_pkey->sig.hashed_data, i_hashed_data_len );
802 gcry_md_putc( hd, 0x04 );
803 gcry_md_putc( hd, 0xff );
805 i_hashed_data_len += 6; /* hashed data + 6 bytes header */
807 gcry_md_putc( hd, (i_hashed_data_len << 24) & 0xff);
808 gcry_md_putc( hd, (i_hashed_data_len << 16) &0xff );
809 gcry_md_putc( hd, (i_hashed_data_len << 8) & 0xff );
810 gcry_md_putc( hd, (i_hashed_data_len) & 0xff );
814 uint8_t *p_tmp = gcry_md_read( hd, GCRY_MD_SHA1);
817 p_tmp[0] != p_pkey->sig.hash_verification[0] ||
818 p_tmp[1] != p_pkey->sig.hash_verification[1] )
824 uint8_t *p_hash = malloc( 20 );
826 memcpy( p_hash, p_tmp, 20 );
832 /*****************************************************************************
834 *****************************************************************************/
837 * Create a new update VLC struct
839 * \param p_this the calling vlc_object
840 * \return pointer to new update_t or NULL
842 update_t *__update_New( vlc_object_t *p_this )
847 p_update = (update_t *)malloc( sizeof( update_t ) );
848 if( !p_update ) return NULL;
850 vlc_mutex_init( p_this, &p_update->lock );
852 p_update->p_libvlc = p_this->p_libvlc;
854 p_update->release.psz_url = NULL;
855 p_update->release.psz_desc = NULL;
857 p_update->p_pkey = NULL;
863 * Delete an update_t struct
865 * \param p_update update_t* pointer
868 void update_Delete( update_t *p_update )
872 vlc_mutex_destroy( &p_update->lock );
874 free( p_update->release.psz_url );
875 free( p_update->release.psz_desc );
876 free( p_update->p_pkey );
882 * Empty the release struct
884 * \param p_update update_t* pointer
887 static void EmptyRelease( update_t *p_update )
889 p_update->release.i_major = 0;
890 p_update->release.i_minor = 0;
891 p_update->release.i_revision = 0;
893 FREENULL( p_update->release.psz_url );
894 FREENULL( p_update->release.psz_desc );
898 * Get the update file and parse it
899 * p_update has to be locked when calling this function
901 * \param p_update pointer to update struct
902 * \return VLC_TRUE if the update is valid and authenticated
904 static vlc_bool_t GetUpdateFile( update_t *p_update )
906 stream_t *p_stream = NULL;
911 char *psz_line = NULL;
912 char *psz_version_line = NULL;
914 p_stream = stream_UrlNew( p_update->p_libvlc, UPDATE_VLC_STATUS_URL );
917 msg_Err( p_update->p_libvlc, "Failed to open %s for reading",
918 UPDATE_VLC_STATUS_URL );
922 /* Try to read three lines */
923 if( !( psz_line = stream_ReadLine( p_stream ) ) )
925 msg_Err( p_update->p_libvlc, "Update file %s is corrupted : missing version",
926 UPDATE_VLC_STATUS_URL );
930 psz_version_line = psz_line;
931 /* first line : version number */
932 p_update->release.extra = 0;
933 switch( sscanf( psz_line, "%i.%i.%i%c", &i_major, &i_minor, &i_revision, &extra ) )
936 p_update->release.extra = extra;
938 p_update->release.i_major = i_major;
939 p_update->release.i_minor = i_minor;
940 p_update->release.i_revision = i_revision;
943 msg_Err( p_update->p_libvlc, "Update version false formated" );
947 /* Second line : URL */
948 if( !( psz_line = stream_ReadLine( p_stream ) ) )
950 msg_Err( p_update->p_libvlc, "Update file %s is corrupted : URL missing",
951 UPDATE_VLC_STATUS_URL );
954 p_update->release.psz_url = psz_line;
957 /* Third line : description */
958 if( !( psz_line = stream_ReadLine( p_stream ) ) )
960 msg_Err( p_update->p_libvlc, "Update file %s is corrupted : description missing",
961 UPDATE_VLC_STATUS_URL );
964 p_update->release.psz_desc = psz_line;
966 stream_Delete( p_stream );
969 /* Now that we know the status is valid, we must download its signature
970 * to authenticate it */
971 signature_packet_v3_t sign;
972 if( download_signature( VLC_OBJECT( p_update->p_libvlc ), &sign,
973 UPDATE_VLC_STATUS_URL ) != VLC_SUCCESS )
975 msg_Err( p_update->p_libvlc, "Couldn't download signature of status file" );
979 if( sign.type != BINARY_SIGNATURE && sign.type != TEXT_SIGNATURE )
981 msg_Err( p_update->p_libvlc, "Invalid signature type" );
985 p_update->p_pkey = (public_key_t*)malloc( sizeof( public_key_t ) );
986 if( !p_update->p_pkey )
989 if( parse_public_key( videolan_public_key, sizeof( videolan_public_key ),
990 p_update->p_pkey, NULL ) != VLC_SUCCESS )
992 msg_Err( p_update->p_libvlc, "Couldn't parse embedded public key, something went really wrong..." );
993 FREENULL( p_update->p_pkey );
997 if( memcmp( sign.issuer_longid, videolan_public_key_longid , 8 ) != 0 )
999 msg_Dbg( p_update->p_libvlc, "Need to download the GPG key" );
1000 public_key_t *p_new_pkey = download_key(
1001 VLC_OBJECT(p_update->p_libvlc),
1002 sign.issuer_longid, videolan_public_key_longid );
1005 msg_Err( p_update->p_libvlc, "Couldn't download GPG key" );
1006 FREENULL( p_update->p_pkey );
1010 uint8_t *p_hash = key_sign_hash( p_new_pkey );
1013 msg_Err( p_update->p_libvlc, "Failed to hash signature" );
1015 FREENULL( p_update->p_pkey );
1019 if( verify_signature( p_new_pkey->sig.r, p_new_pkey->sig.s,
1020 &p_update->p_pkey->key, p_hash ) == VLC_SUCCESS )
1023 msg_Info( p_update->p_libvlc, "Key authenticated" );
1024 free( p_update->p_pkey );
1025 p_update->p_pkey = p_new_pkey;
1030 msg_Err( p_update->p_libvlc, "Key signature invalid !\n" );
1036 if( gcry_md_open( &hd, GCRY_MD_SHA1, 0 ) )
1039 gcry_md_write( hd, psz_version_line, strlen( psz_version_line ) );
1040 FREENULL( psz_version_line );
1041 if( sign.type == TEXT_SIGNATURE )
1042 gcry_md_putc( hd, '\r' );
1043 gcry_md_putc( hd, '\n' );
1044 gcry_md_write( hd, p_update->release.psz_url,
1045 strlen( p_update->release.psz_url ) );
1046 if( sign.type == TEXT_SIGNATURE )
1047 gcry_md_putc( hd, '\r' );
1048 gcry_md_putc( hd, '\n' );
1049 gcry_md_write( hd, p_update->release.psz_desc,
1050 strlen( p_update->release.psz_desc ) );
1051 if( sign.type == TEXT_SIGNATURE )
1052 gcry_md_putc( hd, '\r' );
1053 gcry_md_putc( hd, '\n' );
1055 gcry_md_putc( hd, sign.type );
1056 gcry_md_write( hd, &sign.timestamp, 4 );
1058 gcry_md_final( hd );
1060 uint8_t *p_hash = gcry_md_read( hd, GCRY_MD_SHA1 );
1062 if( p_hash[0] != sign.hash_verification[0] ||
1063 p_hash[1] != sign.hash_verification[1] )
1065 msg_Warn( p_update->p_libvlc, "Bad SHA1 hash for status file" );
1069 if( verify_signature( sign.r, sign.s, &p_update->p_pkey->key, p_hash )
1072 msg_Err( p_update->p_libvlc, "BAD SIGNATURE for status file" );
1077 msg_Info( p_update->p_libvlc, "Status file authenticated" );
1078 gcry_md_close( hd );
1083 gcry_md_close( hd );
1086 stream_Delete( p_stream );
1087 free( psz_version_line );
1093 * Struct to launch the check in an other thread
1099 void (*pf_callback)( void *, vlc_bool_t );
1101 } update_check_thread_t;
1103 void update_CheckReal( update_check_thread_t *p_uct );
1108 * \param p_update pointer to update struct
1109 * \param pf_callback pointer to a function to call when the update_check is finished
1110 * \param p_data pointer to some datas to give to the callback
1113 void update_Check( update_t *p_update, void (*pf_callback)( void*, vlc_bool_t ), void *p_data )
1117 update_check_thread_t *p_uct = vlc_object_create( p_update->p_libvlc,
1118 sizeof( update_check_thread_t ) );
1121 msg_Err( p_update->p_libvlc, "out of memory" );
1125 p_uct->p_update = p_update;
1126 p_uct->pf_callback = pf_callback;
1127 p_uct->p_data = p_data;
1129 vlc_thread_create( p_uct, "check for update", update_CheckReal,
1130 VLC_THREAD_PRIORITY_LOW, VLC_FALSE );
1133 void update_CheckReal( update_check_thread_t *p_uct )
1136 vlc_mutex_lock( &p_uct->p_update->lock );
1138 EmptyRelease( p_uct->p_update );
1139 b_ret = GetUpdateFile( p_uct->p_update );
1140 vlc_mutex_unlock( &p_uct->p_update->lock );
1142 if( p_uct->pf_callback )
1143 (p_uct->pf_callback)( p_uct->p_data, b_ret );
1145 vlc_object_destroy( p_uct );
1149 * Compare two release numbers
1151 * \param p1 first release
1152 * \param p2 second release
1153 * \return UpdateReleaseStatus(Older|Equal|Newer)
1155 static int CompareReleases( const struct update_release_t *p1,
1156 const struct update_release_t *p2 )
1159 d = ( p1->i_major << 24 ) + ( p1->i_minor << 16 ) + ( p1->i_revision << 8 )
1160 - ( p2->i_major << 24 ) - ( p2->i_minor << 16 ) - ( p2->i_revision << 8 )
1161 + ( p1->extra ) - ( p2->extra );
1164 return UpdateReleaseStatusOlder;
1166 return UpdateReleaseStatusEqual;
1168 return UpdateReleaseStatusNewer;
1172 * Compare a given release's version number to the current VLC's one
1174 * \param p_update structure
1175 * \return UpdateReleaseStatus(Older|Equal|Newer)
1177 int update_CompareReleaseToCurrent( update_t *p_update )
1181 struct update_release_t c;
1183 /* get the current version number */
1184 c.i_major = *PACKAGE_VERSION_MAJOR - '0';
1185 c.i_minor = *PACKAGE_VERSION_MINOR - '0';
1186 c.i_revision = *PACKAGE_VERSION_REVISION - '0';
1187 c.extra = *PACKAGE_VERSION_EXTRA;
1189 return CompareReleases( &p_update->release, &c );
1193 * Convert a long int size in bytes to a string
1195 * \param l_size the size in bytes
1196 * \return the size as a string
1198 static char *size_str( long int l_size )
1200 char *psz_tmp = NULL;
1203 i_retval = asprintf( &psz_tmp, "%.1f GB", (float)l_size/(1<<30) );
1204 else if( l_size >> 20 )
1205 i_retval = asprintf( &psz_tmp, "%.1f MB", (float)l_size/(1<<20) );
1206 else if( l_size >> 10 )
1207 i_retval = asprintf( &psz_tmp, "%.1f kB", (float)l_size/(1<<10) );
1209 i_retval = asprintf( &psz_tmp, "%ld B", l_size );
1211 return i_retval == -1 ? NULL : psz_tmp;
1216 * Struct to launch the download in a thread
1223 } update_download_thread_t;
1225 void update_DownloadReal( update_download_thread_t *p_udt );
1228 * Download the file given in the update_t
1230 * \param p_update structure
1231 * \param dir to store the download file
1234 void update_Download( update_t *p_update, char *psz_destdir )
1238 update_download_thread_t *p_udt = vlc_object_create( p_update->p_libvlc,
1239 sizeof( update_download_thread_t ) );
1242 msg_Err( p_update->p_libvlc, "out of memory" );
1246 p_udt->p_update = p_update;
1247 p_udt->psz_destdir = psz_destdir ? strdup( psz_destdir ) : NULL;
1249 vlc_thread_create( p_udt, "download update", update_DownloadReal,
1250 VLC_THREAD_PRIORITY_LOW, VLC_FALSE );
1253 void update_DownloadReal( update_download_thread_t *p_udt )
1257 long int l_downloaded = 0;
1259 char *psz_status = NULL;
1260 char *psz_downloaded = NULL;
1261 char *psz_size = NULL;
1262 char *psz_destfile = NULL;
1263 char *psz_tmpdestfile = NULL;
1265 FILE *p_file = NULL;
1266 stream_t *p_stream = NULL;
1267 void* p_buffer = NULL;
1270 update_t *p_update = p_udt->p_update;
1271 char *psz_destdir = p_udt->psz_destdir;
1273 /* Open the stream */
1274 p_stream = stream_UrlNew( p_udt, p_update->release.psz_url );
1277 msg_Err( p_udt, "Failed to open %s for reading", p_update->release.psz_url );
1281 /* Get the stream size */
1282 l_size = stream_Size( p_stream );
1284 /* Get the file name and open it*/
1285 psz_tmpdestfile = strrchr( p_update->release.psz_url, '/' );
1286 if( !psz_tmpdestfile )
1288 msg_Err( p_udt, "The URL %s is false formated", p_update->release.psz_url );
1292 if( asprintf( &psz_destfile, "%s%s", psz_destdir, psz_tmpdestfile ) == -1 )
1295 p_file = utf8_fopen( psz_destfile, "w" );
1298 msg_Err( p_udt, "Failed to open %s for writing", psz_destfile );
1302 /* Create a buffer and fill it with the downloaded file */
1303 p_buffer = (void *)malloc( 1 << 10 );
1307 psz_size = size_str( l_size );
1308 if( asprintf( &psz_status, "%s\nDownloading... O.O/%s %.1f%% done",
1309 p_update->release.psz_url, psz_size, 0.0 ) != -1 )
1311 i_progress = intf_UserProgress( p_udt, "Downloading ...", psz_status, 0.0, 0 );
1315 while( ( i_read = stream_Read( p_stream, p_buffer, 1 << 10 ) ) &&
1316 !intf_ProgressIsCancelled( p_udt, i_progress ) )
1318 if( fwrite( p_buffer, i_read, 1, p_file ) < 1 )
1320 msg_Err( p_udt, "Failed to write into %s", psz_destfile );
1324 l_downloaded += i_read;
1325 psz_downloaded = size_str( l_downloaded );
1326 f_progress = 100.0*(float)l_downloaded/(float)l_size;
1328 if( asprintf( &psz_status, "%s\nDonwloading... %s/%s %.1f%% done",
1329 p_update->release.psz_url, psz_downloaded, psz_size,
1330 f_progress ) != -1 )
1332 intf_ProgressUpdate( p_udt, i_progress, psz_status, f_progress, 0 );
1335 free( psz_downloaded );
1338 /* Finish the progress bar or delete the file if the user had canceled */
1342 if( !intf_ProgressIsCancelled( p_udt, i_progress ) )
1344 if( asprintf( &psz_status, "%s\nDone %s (100.0%%)",
1345 p_update->release.psz_url, psz_size ) != -1 )
1347 intf_ProgressUpdate( p_udt, i_progress, psz_status, 100.0, 0 );
1353 utf8_unlink( psz_destfile );
1357 signature_packet_v3_t sign;
1358 if( download_signature( VLC_OBJECT( p_udt ), &sign,
1359 p_update->release.psz_url ) != VLC_SUCCESS )
1361 utf8_unlink( psz_destfile );
1363 intf_UserFatal( p_udt, VLC_TRUE, _("File can not be verified"),
1364 _("It was not possible to downlaod a cryptographic signature for "
1365 "downloaded file \"%s\", and so VLC deleted it."),
1367 msg_Err( p_udt, "Couldn't download signature of downloaded file" );
1371 if( sign.type != BINARY_SIGNATURE )
1373 utf8_unlink( psz_destfile );
1374 msg_Err( p_udt, "Invalid signature type" );
1375 intf_UserFatal( p_udt, VLC_TRUE, _("Invalid signature"),
1376 _("The cryptographic signature for downloaded file \"%s\" was "
1377 "invalid and couldn't be used to securely verify it, and so "
1383 uint8_t *p_hash = hash_sha1_from_file( psz_destfile, &sign );
1386 msg_Err( p_udt, "Unable to hash %s", psz_destfile );
1387 utf8_unlink( psz_destfile );
1388 intf_UserFatal( p_udt, VLC_TRUE, _("File not verifiable"),
1389 _("It was not possible to securely verify downloaded file \"%s\", "
1390 "and so VLC deleted it."),
1396 if( p_hash[0] != sign.hash_verification[0] ||
1397 p_hash[1] != sign.hash_verification[1] )
1399 utf8_unlink( psz_destfile );
1400 intf_UserFatal( p_udt, VLC_TRUE, _("File corrupted"),
1401 _("Downloaded file \"%s\" was corrupted, and so VLC deleted it."),
1403 msg_Err( p_udt, "Bad SHA1 hash for %s", psz_destfile );
1408 if( verify_signature( sign.r, sign.s, &p_update->p_pkey->key, p_hash )
1411 utf8_unlink( psz_destfile );
1412 intf_UserFatal( p_udt, VLC_TRUE, _("File corrupted"),
1413 _("Downloaded file \"%s\" was corrupted, and so VLC deleted it."),
1415 msg_Err( p_udt, "BAD SIGNATURE for %s", psz_destfile );
1420 msg_Info( p_udt, "%s authenticated", psz_destfile );
1425 stream_Delete( p_stream );
1428 free( psz_destdir );
1429 free( psz_destfile );
1433 vlc_object_destroy( p_udt );